Occurrence Of Alfalfa Pests Shizuishan Prediction And Prevention And Treatment Measures

Through the systematic investigation and indoor identification，the result shows that inour city Alfalfa insect pest and plant diseases were severious and of different types,distribution. It causes a damage on Alfalfa yield and quality. The main disease were Alfalfabrown spot, Alfalfa mosaic virus virus disease, Alfalfa downy mildew, Clover powdery andAlfalfa leaf spot. Disaster losses caused by pests are Aphids, meadow moth, thrips, plant bugs,like A and leaf miner.The study also concluded that these diseases above usually occurred in the peak of lateJuly to mid-August, aphids, meadow moth, plant bugs there are two peak occurrence of lateMay to early June. Accordance the precepts of this prediction in combination with themeteorological information into account can guide a large area of prevention and treatment ofalfalfa pests and diseases.